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20 Dollars, United States, 1910

20 Dollars, United States, 1910

United States Mint, Philadelphia. Obverse: Liberty with feather headdress, facing left. Reverse: Denomination and date within cereal wreath. The United States Mint experimented with a number of innovative surface treatments for its proof coinage between 1905 and 1915. These included matte and sandblast surfaces that reflected light back in unusual ways. They also included the application of a "Roman" finish, making the surfaces of gold coins look more golden, and more mellow. These experimental surfaces were applied to test new ideas regarding what would work and what would not. The surfaces were also placed there so that the coins that bore them became "special," and could be sold to collectors at a premium.